#include <iostream>
using namespace std;
int main()
{
	int a, b, c;
	cin >> a >> b >> c;
	if(a + b > c && a + c > b && b + c > a && a - b < c && a - c < b && b - c < a)
		cout << 1 << endl;
	else
		cout << 0 << endl;
    return 0;
}
